#!/bin/bash
# Copyright 1999-2004 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License, v2 or later
# Author:  Martin Schlemmer <azarah@gentoo.org>
# $Header: /var/cvsroot/gentoo/src/livecd-tools/opengl-update,v 1.2 2004/09/28 01:35:58 wolf31o2 Exp $

source /etc/init.d/functions.sh

if [ "\`id -u\`" -ne 0 ]
then
	eerror "\${0}: must be root."
	exit 1
fi

usage() {
cat << FOO
usage: opengl-update <GL implementation>

note:  
       This utility switch between OpenGL implementations.  Currently there
       are two supported implementations, namely "xfree" and "nvidia", the
       implementations for XFree86 and the NVidia drivers respectively.

examples:
       opengl-update xfree
       This will setup things to use libGL.so from XFree86

       opengl-update nvidia
       This will setup things to use libGL.so from the NVidia drivers.
	   
FOO
	exit 1
}

if [ "\$#" -ne 1 ]
then
	usage
fi
if [ ! -d /usr/lib/opengl/\${1} ]
then
	usage
else
	ebegin "Switching to \${1} OpenGL interface"

	#set up the \$LDPATH
	echo "LDPATH=/usr/lib/opengl/\${1}/lib" >/etc/env.d/09opengl
	/usr/sbin/env-update &>/dev/null

	#setup the /usr/lib/libGL.so symlink
	rm -f /etc/opengl/libGL.so /etc/opengl/libGL.so.1
	
	realname="\$(readlink /usr/lib/opengl/\${1}/lib/libGL.so)"
	ln -sf /usr/lib/opengl/\${1}/lib/\${realname} \
		/etc/opengl/libGL.so
	ln -sf /usr/lib/opengl/\${1}/lib/\${realname} \
		/etc/opengl/libGL.so.1

	#setup the /usr/X11R6/lib/libMesaGL.so symlink
	rm -f /etc/opengl/libMesaGL.so
	ln -sf /usr/lib/opengl/\${1}/lib/\${realname} \
		/etc/opengl/libMesaGL.so

	rm -f /etc/opengl/libGLcore.so*
	
	if [ -e /usr/lib/opengl/\${1}/lib/libGLcore.so ]
	then
		realname="\$(readlink /usr/lib/opengl/\${1}/lib/libGLcore.so)"
		ln -sf /usr/lib/opengl/\${1}/lib/\${realname} \
			/etc/opengl/libGLcore.so
		ln -sf /usr/lib/opengl/\${1}/lib/\${realname} \
			/etc/opengl/libGLcore.so.1
	fi

	#setup the /usr/X11R6/lib/modules/extensions/libglx.so symlink
	rm -f /etc/opengl/libglx.*
	
	if [ -e /usr/lib/opengl/\${1}/extensions/libglx.so ]
	then
		ln -sf /usr/lib/opengl/\${1}/extensions/libglx.so \
			/etc/opengl/libglx.so
	fi
	#setup the /usr/X11R6/lib/modules/extensions/libglx.a symlink
	if [ -e /usr/lib/opengl/\${1}/extensions/libglx.a ]
	then
		ln -sf /usr/lib/opengl/\${1}/extensions/libglx.a \
			/etc/opengl/libglx.a
	fi

	eend 0
fi


# vim:ts=4